Four-head rotary table tool clamp

Abstract

The invention relates to the technical field of four-head rotary tables, and discloses a four-head rotary table tool clamp which comprises a lower workbench, an upper workbench is fixedly connected to the top of the lower workbench, a four-head rotary table body is installed at the top of the upper workbench, and a discharging mechanism used for assisting scrap discharging is arranged on the inner wall of the lower workbench. A disc tailstock is slidably mounted at the top of the upper workbench, a mounting disc is fixedly connected to the right side of the disc tailstock, a motor is fixedly connected to the left side of the lower workbench, a threaded rod is fixedly connected to the output end of the motor, and a sliding block is in threaded connection to the circumferential surface of the threaded rod. According to the device, shorter shaft workpieces can be clamped and machined, longer shaft workpieces can also be machined, the application range of the device is widened, meanwhile, scraps can be prevented from being accumulated on the upper workbench, then movement adjustment of the disc tailstock is affected, and the scraps are prevented from hurting equipment maintenance workers.

Description

Technical Field

[0001] The invention relates to the technical field of four-head turntables, in particular to a four-head turntable fixture. Background Art

[0002] The four-head turntable, also known as the four-axis turntable, is a device commonly used in machine tool processing, especially widely used in CNC machine tools. Its function is to complete a variety of processing operations by controlling the rotation of the disc and the tailstock, so that the workpiece can be processed at multiple angles in multiple axes. This equipment can significantly improve processing accuracy and efficiency, and is especially suitable for multi-sided processing of complex workpieces.

[0003] The patent with announcement number CN215546958U discloses an integrated four-axis turntable tooling fixture, which relates to the field of tooling fixtures, including a tooling base plate, a disc tailstock and an L-plate are respectively arranged on both sides of the top of the tooling base plate, a T-slot bridge plate is arranged on the inner wall of the L-plate, a plurality of positioning seats are arranged on the top of the T-slot bridge plate, a workpiece is arranged on the inner wall of the positioning seat, and a first cylinder is installed on the top of the T-slot bridge plate opposite the positioning seat. The overall structure of this patent is installed on the tooling base plate, and the tooling fixture can be disassembled and assembled by removing the tooling base plate. The integrated tooling fixture structure makes the overall stability higher and the use effect better. The T-slot bridge plate makes the tooling fixture suitable for processing different types of workpieces. When the type of workpiece changes, the positioning seat, the first cylinder and the second cylinder are replaced so that the corresponding workpiece can be clamped. There is no need to use different types of tooling fixtures for processing, which reduces the manufacturing cost. However, this device is difficult to clamp shaft workpieces of different lengths. The above device needs to disassemble the disc tailstock and adjust the position in order to clamp shaft workpieces of different lengths. The operation is cumbersome, so a four-head turntable tooling fixture is proposed to solve the above-mentioned problems. Summary of the invention

[0004] The technical problem to be solved by the present invention is to provide a four-head turntable fixture in view of the deficiencies in the above-mentioned prior art.

[0005] In order to solve the above technical problems, the technical solution adopted by the present invention is: a four-head turntable fixture, comprising a lower worktable, the top of the lower worktable is fixedly connected to the upper worktable, the top of the upper worktable is equipped with a four-head turntable body, the inner wall of the lower worktable is provided with a discharging mechanism for assisting the discharge of debris, a disc tailstock is slidably installed on the top of the upper worktable, the right side of the disc tailstock is fixedly connected to a mounting plate, the left side of the lower worktable is fixedly connected to a motor, the output end of the motor is fixedly connected to a threaded rod, the circumferential surface of the threaded rod is threadedly connected to a slider, the front and rear sides of the slider are fixedly connected to two connecting rods, and the end of the connecting rod away from the slider is fixed A guide block is fixedly connected, the inner wall of the lower workbench is rotatably connected to a guide rod, a lower push plate is fixedly connected to the right side of the slider, the inner wall of the lower push plate is provided with an anti-jamming mechanism for brushing off debris on the surface of the threaded rod, an upper push plate is fixedly connected to the right side of the disc tailstock, and an adjustment mechanism for reducing the circular runout of shaft workpieces is provided on the top of the upper push plate; a plurality of movable grooves are opened on the surface of the upper workbench, the circumferential surface of the threaded rod is rotatably connected to the inner wall of the lower workbench, the surface of the slider is slidably connected to the inner wall of the movable groove in the upper workbench, and the bottom of the slider contacts the inner wall of the lower workbench; the bottom and top of the guide block are respectively connected to the inner wall of the lower workbench and the upper workbench The bottom of the push plate contacts the inner wall of the lower workbench, and the inner wall of the guide block contacts the circumferential surface of the guide rod. Before installing the shaft workpiece, start the motor, the motor drives the threaded rod to rotate, and the threaded rod drives the slider to rotate through the thread, but the slider is guided by the guide block and the guide rod, so the threaded rod can only drive the slider to move to the right through the thread, and the slider drives the disc tailstock to move. At this time, the distance between the disc tailstock and the four-head turntable is reduced, so that shorter shaft workpieces can be clamped and processed. When the threaded rod rotates in the opposite direction, it will drive the disc tailstock to move to the left and increase the distance between the disc tailstock and the four-head turntable, so that longer shaft workpieces can be processed. At the same time, when the equipment is in use After completion, a dry run will be performed. A dry run can also be performed every time the equipment is started, so that the disc tailstock moves to the right, and the disc tailstock drives the upper push plate to move. The upper push plate pushes the debris on the top of the upper worktable through the inclined block on the right and guides it to the gap in the upper worktable, so that the processing debris can fall from the upper worktable to the lower worktable. At the same time, the slider will push the lower push plate to move, and the lower push plate will uniformly push the debris that falls into the lower worktable out of the through hole on the right side of the lower worktable, so that it falls into the collection box under the processing machine tool, thereby preventing the debris from accumulating on the upper worktable, thereby affecting the movement and adjustment of the disc tailstock, and also preventing the debris from causing harm to the staff who maintain the equipment.

[0006] Preferably, the anti-stuck mechanism includes a shell, the inner wall of the shell is rotatably connected to a lower friction wheel and an upper friction wheel, and the upper friction wheel is located above the lower friction wheel, the side of the upper friction wheel close to the threaded rod is fixedly connected to a turntable through a connecting rod, and the side of the turntable away from the upper friction wheel is fixedly connected to a plurality of bristles; the circumferential surface of the lower friction wheel contacts the circumferential surface of the upper friction wheel, and the side of the turntable away from the bristles contacts the shell, the shell is fixedly connected to the inner wall of the lower push plate, the bottom of the shell contacts the inner wall of the lower workbench, and the circumferential surface of the lower friction wheel contacts the The outer shell drives the lower friction wheel to move, and the lower friction wheel contacts the inner wall of the lower workbench during the movement, and the lower friction wheel rotates itself through the friction wheel. The lower friction wheel drives the upper friction wheel in contact with it to rotate, and the upper friction wheel drives the turntable to rotate through the connecting rod, and the turntable drives the brush to rotate. The bristles can brush away the debris that falls on the surface of the threaded rod to prevent the debris from entering between the slider and the threaded rod, which will cause the threaded rod and the slider to get stuck, thereby ensuring that the slider moves smoothly on the circumferential surface of the threaded rod and improving the service life of the device.

[0007] Preferably, the discharging mechanism includes a guide groove and a reset spiral groove, the guide groove and the reset spiral groove are both provided on the circumferential surface of the guide rod, and the guide groove is located on the left side of the reset spiral groove, the guide groove is composed of two straight grooves and a non-self-locking spiral groove, the non-self-locking spiral groove is located between the two straight grooves, and the two straight grooves and the non-self-locking spiral groove are connected to each other, the inner wall of the lower working table is provided with a slide groove, the inner wall of the slide groove is slidably connected with an inclined plate, and the top of the inclined plate is fixedly connected with a connecting block; the inner wall of the connecting block contacts the circumferential surface of the guide rod, the inner walls of the connecting block and the guide block are both provided with a clamping block, and the clamping block in the connecting block is located in the reset spiral groove, and the clamping block in the guide block is located in the guide groove, when the slider moves to the right, the guide block will be driven to move to the right together through the connecting rod, at this time the clamping block on the inner wall of the guide block will move in the straight groove on the surface of the guide rod, and the guide rod will not rotate at this time, and when the clamping block moves to the non-self-locking spiral groove, the guide block itself will not rotate When the guide block is reset to the left, it will drive the guide rod to rotate in the opposite direction through the non-self-locking spiral groove. At this time, the guide rod will drive the reset spiral groove to rotate. The reset spiral groove drives the connecting block guided by the inclined plate to move left through the block, so that the connecting block drives the inclined plate to move left. After that, the block in the guide block passes the non-self-locking spiral groove and enters the straight groove on the right side of the guide rod. At this time, the guide rod no longer rotates, and when the guide rod stops rotating, the reset spiral groove on the surface of the guide rod will also drive the inclined plate under the connecting block to the left side of the slide groove on the right side of the inner wall of the lower worktable. At this time, the guide block and the slider continue to move right, which will drive the push plate to push the debris onto the inclined plate. When the guide block moves to the left and resets, it will drive the guide rod to rotate in the opposite direction through the non-self-locking spiral groove. At this time, the guide rod will drive the inclined plate under the connecting block to move right through the reset spiral groove. The inclined plate will drive the debris to the discharge port on the right side of the lower worktable, and through the inclined surface on its top, the debris slides out of the lower worktable to complete the discharge. All the debris can be removed through the inclined plate, thereby improving the debris removal effect.

[0008] Preferably, the adjustment mechanism comprises an elastic telescopic plate, a limit rod, an arc block and a rolling ball, the elastic telescopic plate is fixedly connected to the top of the upper push plate, the limit rod is fixedly connected to the two sides of the telescopic end of the elastic telescopic plate, the arc block is fixedly connected to the top of the telescopic end of the elastic telescopic plate, and the rolling ball is movably connected to the inner wall of the top of the arc block; the side of the upper friction wheel away from the turntable is fixedly connected with a protrusion through a connecting rod, the inner wall of the upper push plate is slidably connected with a sliding rod, the top of the sliding rod is fixedly connected with the limit plate, the top of the upper push plate is fixedly connected with a limit spring, and the inner wall of the bottom of the sliding rod is rotatably connected with a roller; the circumferential surface of the roller is in contact with the surface of the protrusion, the top of the limit spring is in contact with the bottom of the limit plate, the limit rod is located on the movement trajectory of the limit plate, the surface of the sliding rod is in contact with the inner wall of the movable groove in the upper working table, and the protrusion is in contact with the outer shell, when the shaft workpiece is clamped, the workpiece can be placed on the rolling ball at the top of the arc block, and the elastic telescopic plate at the bottom of the arc block can be The thickness of the workpiece can be expanded and contracted, so it can play an auxiliary support role when the workpiece is clamped, which is more convenient for the clamping of the workpiece. When the shaft workpiece is clamped on the four-head turntable, there will often be a slight offset in the installation, which will cause the shaft workpiece to rotate circularly. At this time, the motor is started to drive the disc tailstock to move back and forth slightly. At the same time, the four-head turntable drives the shaft workpiece to rotate slowly. When the disc tailstock moves, the upper friction wheel will also rotate, and the upper friction wheel drives the protrusion to rotate through the connecting rod. The protrusion will lift the sliding rod, and the sliding rod will drive the limit plate to move up, and the limit plate will move up and hit the limit rod. The limit rod and the arc block are used to apply external force to the shaft workpiece to correct its circular runout. The closer the limit rod is to the limit plate, the larger the diameter of the shaft workpiece is. At this time, the limit plate is shortened because the distance between the limit plate and the limit rod is shortened. Therefore, the limit plate hits the limit rod with greater force, ensuring that it can also correct the circular runout of large-diameter workpieces. Workers only need to hold the circular runout detector to detect on the workpiece, and stop the motor when the circular runout is reduced to an appropriate value.

[0009] The present invention adopts the above technical solution, which can bring the following beneficial effects: 1. Before installing the shaft workpiece, the four-head turntable fixture starts the motor, the motor drives the threaded rod to rotate, the threaded rod drives the slider to rotate through the thread, but the slider is guided by the guide block and the guide rod, so the threaded rod can only drive the slider to move to the right through the thread, and the slider drives the disc tailstock to move. At this time, the distance between the disc tailstock and the four-head turntable is reduced, so that shorter shaft workpieces can be clamped and processed. When the threaded rod rotates in the opposite direction, it will drive the disc tailstock to move to the left and increase the distance between the disc tailstock and the four-head turntable, so that longer shaft workpieces can be processed. At the same time, it can also prevent debris from accumulating on the upper workbench, thereby affecting the movement and adjustment of the disc tailstock, and also prevent debris from causing harm to the staff who maintain the equipment.

[0010] 2. For the four-head turntable fixture, when the push plate moves, the outer shell will move, and the outer shell will drive the lower friction wheel to move. The lower friction wheel will contact the inner wall of the lower workbench during the movement, and the friction wheel will make the lower friction wheel rotate itself. The lower friction wheel drives the upper friction wheel in contact with it to rotate, and the upper friction wheel drives the turntable to rotate through the connecting rod, and the turntable drives the brush to rotate. The bristles can brush away the debris that falls on the surface of the threaded rod to prevent the debris from entering between the slider and the threaded rod, which will cause the threaded rod and the slider to get stuck, thereby ensuring that the slider moves smoothly on the circumferential surface of the threaded rod and improving the service life of the device.

[0011] 3. The four-head turntable fixture, through the coordinated operation of the guide groove, reset spiral groove, inclined plate, connecting block and slide groove, enables the inclined plate to drive the debris to the discharge port on the right side of the lower workbench, and through the inclined surface on its top, the debris slides out of the lower workbench to complete the discharge. The debris can be completely removed through the inclined plate, thereby improving the debris removal effect.

[0012] 4. For the four-head turntable fixture, when clamping an axial workpiece, the workpiece can be placed on the rolling ball on the top of the arc block, and the elastic expansion plate at the bottom of the arc block can be expanded and contracted according to the thickness of the axial workpiece. Therefore, it can play an auxiliary support role when clamping the workpiece, which is more convenient for clamping the workpiece. The limit plate moves up and hits the limit rod. The limit rod and the arc block apply external force to the axial workpiece to correct its circular runout. The closer the limit rod is to the limit plate, the larger the diameter of the axial workpiece. At this time, the limit plate is shortened because the distance between the limit plate and the limit rod is shortened. Therefore, the limit plate hits the limit rod with greater force, ensuring that it can also correct the circular runout of large-diameter workpieces. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 A half-section view of the lower workbench structure of the present invention; Figure 3 This is a schematic diagram of the guide block structure of the present invention; Figure 4 A half-section diagram of the shell structure of the present invention; Figure 5 It is a schematic diagram of the guide rod structure of the present invention; Figure 6 This is a schematic diagram of the structure of the elastic telescopic plate of the present invention; Figure 7 For the present invention Figure 6 A magnified view of the structure in the middle.

[0014] In the figure: 1. lower workbench; 2. upper workbench; 3. four-head turntable body; 4. disc tailstock; 5. mounting plate; 6. motor; 7. anti-stuck mechanism; 71. housing; 72. lower friction wheel; 73. upper friction wheel; 74. turntable; 75. brush; 8. discharging mechanism; 81. guide groove; 82. reset spiral groove; 83. inclined plate; 84. connecting block; 85. slide groove; 9. adjustment mechanism; 91. elastic telescopic plate; 92. limit rod; 93. arc block; 94. rolling ball; 95. bump; 96. slide rod; 97. limit plate; 98. limit spring; 99. roller; 10. threaded rod; 11. slider; 12. connecting rod; 13. guide block; 14. guide rod; 15. lower push plate; 16. upper push plate. DETAILED DESCRIPTION

[0015] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0016] See also Figure 1-Figure 7An embodiment of the present invention is: a four-head turntable fixture, comprising a lower worktable 1, the top of the lower worktable 1 is fixedly connected to the upper worktable 2, the top of the upper worktable 2 is installed with a four-head turntable body 3, the inner wall of the lower worktable 1 is provided with a discharging mechanism 8 for assisting the discharge of debris, a disc tailstock 4 is slidably installed on the top of the upper worktable 2, the right side of the disc tailstock 4 is fixedly connected with a mounting plate 5, the left side of the lower worktable 1 is fixedly connected with a motor 6, the output end of the motor 6 is fixedly connected with a threaded rod 10, the circumferential surface of the threaded rod 10 is threadedly connected with a slider 11, the front and rear sides of the slider 11 are fixedly connected with two connecting rods 12, the end of the connecting rod 12 away from the slider 11 is fixedly connected with a guide block 13, the lower worktable 1 The inner wall is rotatably connected to a guide rod 14, and a lower push plate 15 is fixedly connected to the right side of the slider 11. The inner wall of the lower push plate 15 is provided with an anti-stuck mechanism 7 for brushing off debris on the surface of the threaded rod 10, and an upper push plate 16 is fixedly connected to the right side of the disc tailstock 4. An adjustment mechanism 9 for reducing the circular runout of the shaft workpiece is provided on the top of the upper push plate 16. Before installing the shaft workpiece, start the motor 6, and the motor 6 drives the threaded rod 10 to rotate. The threaded rod 10 drives the slider 11 to rotate through the thread, but the slider 11 is guided by the guide block 13 and the guide rod 14. Therefore, the threaded rod 10 can only drive the slider 11 to move to the right through the thread, and the slider 11 drives the disc tailstock 4 to move. At this time, the distance between the disc tailstock 4 and the four-head turntable is reduced, so that a shorter The shaft workpiece is clamped and processed. When the threaded rod 10 rotates in the opposite direction, the disc tailstock 4 will be driven to move to the left, and the distance between the disc tailstock 4 and the four-head turntable will be increased, so that longer shaft workpieces can be processed; a plurality of movable grooves are provided on the surface of the upper workbench 2, the circumferential surface of the threaded rod 10 is rotatably connected to the inner wall of the lower workbench 1, the surface of the slider 11 is slidably connected to the inner wall of the movable groove in the upper workbench 2, and the bottom of the slider 11 is in contact with the inner wall of the lower workbench 1; the bottom and top of the guide block 13 are in contact with the inner wall of the lower workbench 1 and the bottom of the upper workbench 2 respectively, the bottom of the lower push plate 15 is in contact with the inner wall of the lower workbench 1, and the inner wall of the guide block 13 is in contact with the circumferential surface of the guide rod 14. After the equipment is used, The upper push plate 16 pushes the chips on the top of the upper workbench 2 through the inclined block on the right and guides them to the gap of the upper workbench 2, so that the processed chips can fall from the upper workbench 2 into the lower workbench 1. At the same time, the slider 11 pushes the lower push plate 15 to move, and the lower push plate 15 will uniformly push the chips that fall into the lower workbench 1 through the through hole on the right side of the lower workbench 1, so that they fall into the collection box under the processing machine, thereby preventing the chips from accumulating on the upper workbench 2 and affecting the movement and adjustment of the disc tailstock 4, and also preventing the chips from causing harm to the staff who maintain the equipment.

[0017] The anti-jamming mechanism 7 includes a shell 71, the inner wall of the shell 71 is rotatably connected to a lower friction wheel 72 and an upper friction wheel 73, and the upper friction wheel 73 is located above the lower friction wheel 72, and the side of the upper friction wheel 73 close to the threaded rod 10 is fixedly connected to a turntable 74 through a connecting rod, and the side of the turntable 74 away from the upper friction wheel 73 is fixedly connected to a plurality of bristles 75. When the push plate 15 moves, the shell 71 is driven to move, and the shell 71 drives the lower friction wheel 72 to move, and the lower friction wheel 72 contacts the inner wall of the lower workbench 1 during the movement, and the lower friction wheel 72 rotates itself through the friction wheel, and the lower friction wheel 72 drives the upper friction wheel 73 in contact with it to rotate, and the upper friction wheel 73 is connected to the upper friction wheel 73 through the lower friction wheel 72. The connecting rod drives the turntable 74 to rotate, and the turntable 74 drives the brush 75 to rotate. The brush 75 can brush away the debris that falls on the surface of the threaded rod 10 to prevent the debris from entering between the slider 11 and the threaded rod 10, thereby causing the threaded rod 10 and the slider 11 to get stuck, thereby ensuring that the slider 11 can move smoothly on the circumferential surface of the threaded rod 10 and improving the service life of the device; the circumferential surface of the lower friction wheel 72 contacts the circumferential surface of the upper friction wheel 73, and the side of the turntable 74 away from the brush 75 contacts the outer shell 71, the outer shell 71 is fixedly connected to the inner wall of the lower push plate 15, the bottom of the outer shell 71 contacts the inner wall of the lower workbench 1, and the circumferential surface of the lower friction wheel 72 contacts the inner wall of the lower workbench 1.

[0018] Working principle: before installing the shaft workpiece, start the motor 6, the motor 6 drives the threaded rod 10 to rotate, the threaded rod 10 drives the slider 11 to rotate through the thread, but the slider 11 is guided by the guide block 13 and the guide rod 14, so the threaded rod 10 can only drive the slider 11 to move to the right through the thread, and the slider 11 drives the disc tailstock 4 to move. At this time, the distance between the disc tailstock 4 and the four-head turntable is reduced, so that shorter shaft workpieces can be clamped and processed. When the threaded rod 10 rotates in the opposite direction, it will drive the disc tailstock 4 to move to the left and increase the distance between the disc tailstock 4 and the four-head turntable, so that longer shaft workpieces can be processed. At the same time, after the equipment is used, it will perform an empty run, and it can also Each time the equipment is started, an idle run is performed, so that the disc tailstock 4 moves to the right, and the disc tailstock 4 drives the upper push plate 16 to move. The upper push plate 16 pushes the debris on the top of the upper workbench 2 through the inclined block on the right side and guides it to the gap of the upper workbench 2, so that the processing debris can fall from the upper workbench 2 into the lower workbench 1. At the same time, the slider 11 will push the lower push plate 15 to move, and the lower push plate 15 will uniformly push the debris that falls into the lower workbench 1 out of the through hole on the right side of the lower workbench 1, so that it falls into the collection box under the processing machine tool, thereby preventing the debris from accumulating on the upper workbench 2, thereby affecting the movement and adjustment of the disc tailstock 4, and also preventing the debris from causing harm to the staff who maintain the equipment; When the push plate 15 moves, the outer shell 71 will move, and the outer shell 71 will drive the lower friction wheel 72 to move. The lower friction wheel 72 will contact the inner wall of the lower workbench 1 during the movement, and the friction wheel will make the lower friction wheel 72 rotate itself. The lower friction wheel 72 drives the upper friction wheel 73 in contact with it to rotate, and the upper friction wheel 73 drives the turntable 74 to rotate through the connecting rod, and the turntable 74 drives the brush 75 to rotate. The brush 75 can brush away the debris that falls on the surface of the threaded rod 10 to prevent the debris from entering between the slider 11 and the threaded rod 10, thereby causing the threaded rod 10 and the slider 11 to be stuck, thereby ensuring that the slider 11 can move smoothly on the circumferential surface of the threaded rod 10 and improving the service life of the device.

[0019] See also Figure 1-Figure 7On the basis of the above embodiment, in another embodiment of the present invention, the discharging mechanism 8 includes a guide groove 81 and a reset spiral groove 82, the guide groove 81 and the reset spiral groove 82 are both provided on the circumferential surface of the guide rod 14, and the guide groove 81 is located on the left side of the reset spiral groove 82, the guide groove 81 is composed of two straight grooves and a non-self-locking spiral groove, the non-self-locking spiral groove is located between the two straight grooves, and the two straight grooves and the non-self-locking spiral groove are connected to each other, the inner wall of the lower workbench 1 is provided with a slide groove 85, the inner wall of the slide groove 85 is slidably connected with an inclined plate 83, the top of the inclined plate 83 The inner wall of the connecting block 84 contacts the circumferential surface of the guide rod 14, and the inner walls of the connecting block 84 and the guide block 13 are provided with a card block, and the card block in the connecting block 84 is located in the reset spiral groove 82, and the card block in the guide block 13 is located in the guide groove 81. When the slider 11 moves to the right, the guide block 13 will be driven to move to the right together through the connecting rod 12. At this time, the card block on the inner wall of the guide block 13 will move in the straight groove on the surface of the guide rod 14. At this time, the guide rod 14 will not rotate. When the card block moves to the non-self-locking spiral groove, since the guide block 13 itself will not rotate, The block in the guide block 13 will drive the guide rod 14 to rotate through the non-self-locking spiral groove. When the guide rod 14 rotates, it will drive the reset spiral groove 82 to rotate. The reset spiral groove 82 drives the connecting block 84 guided by the inclined plate 83 to move left through the block, so that the connecting block 84 drives the inclined plate 83 to move left. Then the block in the guide block 13 passes over the non-self-locking spiral groove and enters the straight groove on the right side of the guide rod 14. At this time, the guide rod 14 no longer rotates. When the guide rod 14 stops rotating, the reset spiral groove 82 on the surface of the guide rod 14 also drives the inclined plate 83 under the connecting block 84 to the lower workbench 1 When the guide block 13 is reset to the left, the guide rod 14 is driven to rotate in the opposite direction through the non-self-locking spiral groove. At this time, the guide rod 14 drives the inclined plate 83 under the connecting block 84 to move right through the reset spiral groove 82. The inclined plate 83 drives the debris to the discharge port on the right side of the lower workbench 1, and through the inclined surface at the top of itself, the debris slides out of the lower workbench 1 to complete the discharge. All the debris can be removed through the inclined plate 83, thereby improving the debris removal effect.

[0020] The adjustment mechanism 9 includes an elastic telescopic plate 91, a limiting rod 92, an arc block 93 and a rolling ball 94. The elastic telescopic plate 91 is fixedly connected to the top of the upper push plate 16, the limiting rod 92 is fixedly connected to both sides of the telescopic end of the elastic telescopic plate 91, the arc block 93 is fixedly connected to the top of the telescopic end of the elastic telescopic plate 91, and the rolling ball 94 is movably connected to the inner wall of the top of the arc block 93. When the shaft workpiece is clamped, the workpiece can be placed on the rolling ball 94 at the top of the arc block 93, and the elastic telescopic plate 91 at the bottom of the arc block 93 can be extended and retracted according to the thickness of the shaft workpiece, so that the workpiece can be adjusted. It plays the role of auxiliary support during clamping, which makes it more convenient to clamp the workpiece; the side of the upper friction wheel 73 away from the turntable 74 is fixedly connected with a protrusion 95 through a connecting rod, the inner wall of the upper push plate 16 is slidably connected with a slide bar 96, the top of the slide bar 96 is fixedly connected with a limit plate 97, and the top of the upper push plate 16 is fixedly connected with a limit spring 98. The limit spring 98 can buffer the slide bar 96 every time it falls, and the inner wall of the bottom of the slide bar 96 is rotatably connected with a roller 99; the circumferential surface of the roller 99 contacts the surface of the protrusion 95, and the top of the limit spring 98 contacts the bottom of the limit plate 97. Rod 92 is located on the motion track of limit plate 97, the surface of slide bar 96 contacts the inner wall of the movable groove in upper workbench 2, and protrusion 95 contacts housing 71. When shaft workpiece is clamped on four-head turntable, slight deviation of installation often occurs, which leads to circular runout of shaft workpiece. At this time, motor 6 is started to drive disc tailstock 4 to move back and forth in a small amplitude. At the same time, four-head turntable drives shaft workpiece to rotate slowly. When disc tailstock 4 moves, upper friction wheel 73 also rotates. Upper friction wheel 73 drives protrusion 95 to rotate through connecting rod. Protrusion 95 lifts slide bar 96, and slide bar 96 drives The limit plate 97 moves up, and the limit plate 97 moves up and hits the limit rod 92. The limit rod 92 and the arc block 93 apply external force to the shaft workpiece to correct its circular runout. When the limit rod 92 is closer to the limit plate 97, it means that the diameter of the shaft workpiece is larger. At this time, the limit plate 97 is closer to the limit rod 92, so the limit plate 97 hits the limit rod 92 with greater force, ensuring that it can also correct the circular runout of large diameter workpieces. The worker only needs to hold the circular runout detector to detect on the workpiece, and stop the motor 6 when the circular runout is reduced to an appropriate value.

[0021] Working principle: when the slider 11 moves to the right, it will drive the guide block 13 to move to the right together through the connecting rod 12. At this time, the block on the inner wall of the guide block 13 will move in the straight groove on the surface of the guide rod 14. At this time, the guide rod 14 will not rotate. When the block moves to the non-self-locking spiral groove, since the guide block 13 itself will not rotate, the block in the guide block 13 will drive the guide rod 14 to rotate through the non-self-locking spiral groove. When the guide rod 14 rotates, it will drive the reset spiral groove 82 to rotate. The reset spiral groove 82 drives the connecting block 84 guided by the inclined plate 83 to move left through the block, so that the connecting block 84 drives the inclined plate 83 to move left. After that, the block in the guide block 13 passes over the non-self-locking spiral groove and enters the straight groove on the right side of the guide rod 14. At this time, the guide rod 14 no longer rotates. When the guide rod 14 stops rotating, the reset spiral groove 82 on the surface of the guide rod 14 also drives the inclined plate 83 under the connecting block 84 to the left side of the slide groove 85 on the right side of the inner wall of the lower workbench 1. At this time, the guide block 13 and the sliding block 11 continue to move right, which will drive the lower push plate 15 to push the debris onto the inclined plate 83. When the guide block 13 moves to the left and resets, it will drive the guide rod 14 to rotate in the opposite direction through the non-self-locking spiral groove. At this time, the guide rod 14 will drive the inclined plate 83 under the connecting block 84 to move right through the reset spiral groove 82. The inclined plate 83 will drive the debris to the discharge port on the right side of the lower workbench 1, and through the inclined surface at the top of itself, the debris will slide out of the lower workbench 1 to complete the discharge. The debris can be completely removed through the inclined plate 83, thereby improving the debris removal effect. When a shaft workpiece is clamped, the workpiece can be placed on the rolling ball 94 on the top of the arc block 93, and the elastic expansion plate 91 at the bottom of the arc block 93 can be expanded and contracted according to the thickness of the shaft workpiece, so it can play an auxiliary support role when the workpiece is clamped, which is more convenient for the clamping of the workpiece. When the shaft workpiece is clamped on the four-head turntable, there will often be a slight offset in the installation, which will cause the shaft workpiece to jump out of the circle. At this time, the motor 6 is started to drive the disc tailstock 4 to move back and forth in a small amplitude. At the same time, the four-head turntable drives the shaft workpiece to rotate slowly. When the disc tailstock 4 moves, the upper friction wheel 73 will also rotate, and the upper friction wheel 73 drives the bump 95 to rotate through the connecting rod , the protrusion 95 will lift the sliding rod 96, and the sliding rod 96 will drive the limit plate 97 to move up, and the limit plate 97 will move up and hit the limit rod 92, and the limit rod 92 and the arc block 93 will apply external force to the shaft workpiece to correct its circular runout. When the limit rod 92 is closer to the limit plate 97, it means that the diameter of the shaft workpiece is larger. At this time, the limit plate 97 hits the limit rod 92 with greater force because the distance between the limit plate 97 and the limit rod 92 is shortened, ensuring that it can also correct the circular runout of large diameter workpieces. The worker only needs to hold the circular runout detector to detect on the workpiece, and stop the motor 6 when the circular runout is reduced to an appropriate value.

[0022] The present invention provides a four-head turntable fixture. There are many methods and ways to implement the technical solution. The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be regarded as the protection scope of the present invention. All components not specified in this embodiment can be implemented by existing technologies.

Claims

1. A four-head turntable fixture, comprising a lower worktable (1), characterized in that: The top of the lower workbench (1) is fixedly connected to the upper workbench (2), the top of the upper workbench (2) is installed with a four-head turntable body (3), the inner wall of the lower workbench (1) is provided with a discharge mechanism (8) for assisting the discharge of debris, the top of the upper workbench (2) is slidably installed with a disc tailstock (4), the right side of the disc tailstock (4) is fixedly connected to a mounting plate (5), the left side of the lower workbench (1) is fixedly connected to a motor (6), the output end of the motor (6) is fixedly connected to a threaded rod (10), the circumferential surface of the threaded rod (10) is threadedly connected to a slider (11), and the slider Two connecting rods (12) are fixedly connected to the front and rear sides of the slider (11), and one end of the connecting rod (12) away from the slider (11) is fixedly connected to a guide block (13). The inner wall of the lower workbench (1) is rotatably connected to a guide rod (14). The right side of the slider (11) is fixedly connected to a lower push plate (15), and the inner wall of the lower push plate (15) is provided with an anti-jamming mechanism (7) for brushing off debris on the surface of the threaded rod (10). The right side of the disc tailstock (4) is fixedly connected to an upper push plate (16), and the top of the upper push plate (16) is provided with an adjustment mechanism (9) for reducing the circular runout of the shaft workpiece.

2. A four-head turntable fixture according to claim 1, characterized in that: The surface of the upper workbench (2) is provided with a plurality of movable grooves, the circumferential surface of the threaded rod (10) is rotatably connected to the inner wall of the lower workbench (1), the surface of the slider (11) is slidably connected to the inner wall of the movable groove in the upper workbench (2), and the bottom of the slider (11) is in contact with the inner wall of the lower workbench (1).

3. A four-head turntable fixture according to claim 2, characterized in that: The bottom and top of the guide block (13) are in contact with the inner wall of the lower workbench (1) and the bottom of the upper workbench (2) respectively, the bottom of the lower push plate (15) is in contact with the inner wall of the lower workbench (1), and the inner wall of the guide block (13) is in contact with the circumferential surface of the guide rod (14).

4. A four-head turntable fixture according to claim 3, characterized in that: The anti-jamming mechanism (7) comprises a housing (71), the inner wall of the housing (71) being rotatably connected to a lower friction wheel (72) and an upper friction wheel (73), the upper friction wheel (73) being located above the lower friction wheel (72), a side of the upper friction wheel (73) close to the threaded rod (10) being fixedly connected to a rotating disk (74) via a connecting rod, and a side of the rotating disk (74) away from the upper friction wheel (73) being fixedly connected to a plurality of bristles (75).

5. The four-head turntable fixture according to claim 4 is characterized in that: The circumferential surface of the lower friction wheel (72) contacts the circumferential surface of the upper friction wheel (73); the side of the turntable (74) away from the bristles (75) contacts the outer shell (71); the outer shell (71) is fixedly connected to the inner wall of the lower push plate (15); the bottom of the outer shell (71) contacts the inner wall of the lower workbench (1); and the circumferential surface of the lower friction wheel (72) contacts the inner wall of the lower workbench (1).

6. The four-head turntable fixture according to claim 5, characterized in that: The discharging mechanism (8) comprises a guide groove (81) and a reset spiral groove (82). The guide groove (81) and the reset spiral groove (82) are both formed on the circumferential surface of the guide rod (14), and the guide groove (81) is located on the left side of the reset spiral groove (82). The guide groove (81) consists of two straight grooves and a non-self-locking spiral groove. The non-self-locking spiral groove is located between the two straight grooves, and the two straight grooves and the non-self-locking spiral groove are connected to each other. The inner wall of the lower workbench (1) is provided with a slide groove (85), and the inner wall of the slide groove (85) is slidably connected to an inclined plate (83), and the top of the inclined plate (83) is fixedly connected to a connecting block (84).

7. The four-head turntable fixture according to claim 6, characterized in that: The inner wall of the connecting block (84) contacts the circumferential surface of the guide rod (14), and the inner walls of the connecting block (84) and the guide block (13) are both provided with a clamping block, and the clamping block in the connecting block (84) is located in the reset spiral groove (82), and the clamping block in the guide block (13) is located in the guide groove (81).

8. The four-head turntable fixture according to claim 7, characterized in that: The adjustment mechanism (9) comprises an elastic telescopic plate (91), a limiting rod (92), an arc block (93) and a rolling ball (94); the elastic telescopic plate (91) is fixedly connected to the top of the upper push plate (16); the limiting rod (92) is fixedly connected to both sides of the telescopic end of the elastic telescopic plate (91); the arc block (93) is fixedly connected to the top of the telescopic end of the elastic telescopic plate (91); and the rolling ball (94) is movably connected to the inner wall of the top of the arc block (93).

9. The four-head turntable fixture according to claim 8, characterized in that: A protrusion (95) is fixedly connected to the side of the upper friction wheel (73) away from the turntable (74) through a connecting rod, and a sliding rod (96) is slidably connected to the inner wall of the upper push plate (16). The top of the sliding rod (96) is fixedly connected to a limiting plate (97), the top of the upper push plate (16) is fixedly connected to a limiting spring (98), and the inner wall of the bottom of the sliding rod (96) is rotatably connected to a roller (99).

10. The four-head turntable fixture according to claim 9, characterized in that: The circumferential surface of the roller (99) contacts the surface of the protrusion (95), the top of the limit spring (98) contacts the bottom of the limit plate (97), the limit rod (92) is located on the movement track of the limit plate (97), the surface of the slide rod (96) contacts the inner wall of the movable groove in the upper workbench (2), and the protrusion (95) contacts the housing (71).

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